here is the station master, harry kelly, in his own words. >> this is my office. it's exciting to be here. >> i'm the superintendent of building services of gct, grand central terminal. >> the way people barge in and out, you would think it was grand central station. >> a lot of people say "station." terminal, it's a terminal, because trains start and finish here. >> we go back since 1974. i'm always walking. visibility is a big thing. i can't sit still. the tennis court, it is a secret in a way. a lot of people don't realize it's here. the ceiling was very dirty. there's one spot that was left intact on top of track 30, shows you how dirty the ceiling actually was. this is the elevator that will take you to the furthest floor below grand central. power department, generators and stuff like that. >> everything is automatic now. time moves on. what are you going to do? >> the 454 train going to north white plains, the train departs from track number 102a on the lower level. >> 51:15 from new haven is running late. 98% on time now. it's too dull sometimes when -- be